Supco SHL507 Plenum Limit Switch L140-30F

The Supco SHL507 Plenum Limit Switch is a temperature-responsive switching control designed to monitor thermal conditions within a component and change an electrical circuit according to the defined limit settings. When the sensed temperature reaches 140F, the internal contacts respond by opening the controlled circuit, while cooling to 30F causes the mechanism to close and restore electrical continuity. This differential switching action provides automatic electrical response to changes in the monitored air temperature in HVAC systems. The switch interfaces with the associated control wiring to regulate connected functions according to the temperature conditions detected inside the plenum.